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  <title>The XML C parser and toolkit of Gnome</title>
  
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<body bgcolor="#8b7765" text="#000000" link="#a06060" vlink="#000000"><table border="0" width="100%" cellpadding="5" cellspacing="0" align="center"><tr><td width="120"><a href="http://swpat.ffii.org/"><img src="epatents.png" alt="Action against software patents" /></a></td><td width="180"><a href="http://www.gnome.org/"><img src="gnome2.png" alt="Gnome2 Logo" /></a><a href="http://www.w3.org/Status"><img src="w3c.png" alt="W3C Logo" /></a><a href="http://www.redhat.com/"><img src="redhat.gif" alt="Red Hat Logo" /></a><div align="left"><a href="http://xmlsoft.org/"><img src="Libxml2-Logo-180x168.gif" alt="Made with Libxml2 Logo" /></a></div></td><td><table border="0" width="90%" cellpadding="2" cellspacing="0" align="center" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3" bgcolor="#fffacd"><tr><td align="center"><h1>The XML C parser and toolkit of Gnome</h1><h2>libxml</h2></td></tr></table></td></tr></table></td></tr></table><table border="0" cellpadding="4" cellspacing="0" width="100%" align="center"><tr><td bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="2" width="100%"><tr><td valign="top" width="200" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table width="100%" border="0" cellspacing="1" cellpadding="3"><tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Main Menu</b></center></td></tr><tr><td bgcolor="#fffacd"><form action="search.php" enctype="application/x-www-form-urlencoded" method="get"><input name="query" type="text" size="20" value="" /><input name="submit" type="submit" value="Search ..." /></form><ul><li><a href="index.html">Home</a></li><li><a href="html/index.html">Reference Manual</a></li><li><a href="intro.html">Introduction</a></li><li><a href="FAQ.html">FAQ</a></li><li><a href="docs.html" style="font-weight:bold">Developer Menu</a></li><li><a href="bugs.html">Reporting bugs and getting help</a></li><li><a href="help.html">How to help</a></li><li><a href="downloads.html">Downloads</a></li><li><a href="news.html">Releases</a></li><li><a href="XMLinfo.html">XML</a></li><li><a href="XSLT.html">XSLT</a></li><li><a href="xmldtd.html">Validation &amp; DTDs</a></li><li><a href="encoding.html">Encodings support</a></li><li><a href="catalog.html">Catalog support</a></li><li><a href="namespaces.html">Namespaces</a></li><li><a href="contribs.html">Contributions</a></li><li><a href="examples/index.html" style="font-weight:bold">Code Examples</a></li><li><a href="html/index.html" style="font-weight:bold">API Menu</a></li><li><a href="guidelines.html">XML Guidelines</a></li><li><a href="ChangeLog.html">Recent Changes</a></li></ul></td></tr></table><table width="100%" border="0" cellspacing="1" cellpadding="3"><tr><td colspan="1" bgcolor="#eecfa1" align="center"><center><b>Related links</b></center></td></tr><tr><td bgcolor="#fffacd"><ul><li><a href="http://mail.gnome.org/archives/xml/">Mail archive</a></li><li><a href="http://xmlsoft.org/XSLT/">XSLT libxslt</a></li><li><a href="http://phd.cs.unibo.it/gdome2/">DOM gdome2</a></li><li><a href="http://www.aleksey.com/xmlsec/">XML-DSig xmlsec</a></li><li><a href="ftp://xmlsoft.org/">FTP</a></li><li><a href="http://www.zlatkovic.com/projects/libxml/">Windows binaries</a></li><li><a href="http://opencsw.org/packages/libxml2">Solaris binaries</a></li><li><a href="http://www.explain.com.au/oss/libxml2xslt.html">MacOsX binaries</a></li><li><a href="http://lxml.de/">lxml Python bindings</a></li><li><a href="http://cpan.uwinnipeg.ca/dist/XML-LibXML">Perl bindings</a></li><li><a href="http://libxmlplusplus.sourceforge.net/">C++ bindings</a></li><li><a href="http://www.zend.com/php5/articles/php5-xmlphp.php#Heading4">PHP bindings</a></li><li><a href="http://sourceforge.net/projects/libxml2-pas/">Pascal bindings</a></li><li><a href="http://libxml.rubyforge.org/">Ruby bindings</a></li><li><a href="http://tclxml.sourceforge.net/">Tcl bindings</a></li><li><a href="http://bugzilla.gnome.org/buglist.cgi?product=libxml2">Bug Tracker</a></li></ul></td></tr></table></td></tr></table></td><td valign="top" bgcolor="#8b7765"><table border="0" cellspacing="0" cellpadding="1" width="100%"><tr><td><table border="0" cellspacing="0" cellpadding="1" width="100%" bgcolor="#000000"><tr><td><table border="0" cellpadding="3" cellspacing="1" width="100%"><tr><td bgcolor="#fffacd"><p></p><p style="text-align: right; font-style: italic; font-size: 10pt">"Programming
with libxml2 is like the thrilling embrace of an exotic stranger." <a href="http://diveintomark.org/archives/2004/02/18/libxml2">Mark
Pilgrim</a></p><p>Libxml2 is the XML C parser and toolkit developed for the Gnome project
(but usable outside of the Gnome platform), it is free software available
under the <a href="http://www.opensource.org/licenses/mit-license.html">MIT
License</a>. XML itself is a metalanguage to design markup languages, i.e.
text language where semantic and structure are added to the content using
extra "markup" information enclosed between angle brackets. HTML is the most
well-known markup language. Though the library is written in C <a href="python.html">a variety of language bindings</a> make it available in
other environments.</p><p>Libxml2 is known to be very portable, the library should build and work
without serious troubles on a variety of systems (Linux, Unix, Windows,
CygWin, MacOS, MacOS X, RISC Os, OS/2, VMS, QNX, MVS, VxWorks, ...)</p><p>Libxml2 implements a number of existing standards related to markup
languages:</p><ul>
  <li>the XML standard: <a href="http://www.w3.org/TR/REC-xml">http://www.w3.org/TR/REC-xml</a></li>
  <li>Namespaces in XML: <a href="http://www.w3.org/TR/REC-xml-names/">http://www.w3.org/TR/REC-xml-names/</a></li>
  <li>XML Base: <a href="http://www.w3.org/TR/xmlbase/">http://www.w3.org/TR/xmlbase/</a></li>
  <li><a href="http://www.cis.ohio-state.edu/rfc/rfc2396.txt">RFC 2396</a> :
    Uniform Resource Identifiers <a href="http://www.ietf.org/rfc/rfc2396.txt">http://www.ietf.org/rfc/rfc2396.txt</a></li>
  <li>XML Path Language (XPath) 1.0: <a href="http://www.w3.org/TR/xpath">http://www.w3.org/TR/xpath</a></li>
  <li>HTML4 parser: <a href="http://www.w3.org/TR/html401/">http://www.w3.org/TR/html401/</a></li>
  <li>XML Pointer Language (XPointer) Version 1.0: <a href="http://www.w3.org/TR/xptr">http://www.w3.org/TR/xptr</a></li>
  <li>XML Inclusions (XInclude) Version 1.0: <a href="http://www.w3.org/TR/xinclude/">http://www.w3.org/TR/xinclude/</a></li>
  <li>ISO-8859-x encodings, as well as <a href="http://www.cis.ohio-state.edu/rfc/rfc2044.txt">rfc2044</a> [UTF-8]
    and <a href="http://www.cis.ohio-state.edu/rfc/rfc2781.txt">rfc2781</a>
    [UTF-16] Unicode encodings, and more if using iconv support</li>
  <li>part of SGML Open Technical Resolution TR9401:1997</li>
  <li>XML Catalogs Working Draft 06 August 2001: <a href="http://www.oasis-open.org/committees/entity/spec-2001-08-06.html">http://www.oasis-open.org/committees/entity/spec-2001-08-06.html</a></li>
  <li>Canonical XML Version 1.0: <a href="http://www.w3.org/TR/xml-c14n">http://www.w3.org/TR/xml-c14n</a>
    and the Exclusive XML Canonicalization CR draft <a href="http://www.w3.org/TR/xml-exc-c14n">http://www.w3.org/TR/xml-exc-c14n</a></li>
  <li>Relax NG, ISO/IEC 19757-2:2003, <a href="http://www.oasis-open.org/committees/relax-ng/spec-20011203.html">http://www.oasis-open.org/committees/relax-ng/spec-20011203.html</a></li>
  <li>W3C XML Schemas Part 2: Datatypes <a href="http://www.w3.org/TR/2001/REC-xmlschema-2-20010502/">REC 02 May
    2001</a></li>
  <li>W3C <a href="http://www.w3.org/TR/xml-id/">xml:id</a> Working Draft 7
    April 2004</li>
</ul><p>In most cases libxml2 tries to implement the specifications in a
relatively strictly compliant way. As of release 2.4.16, libxml2 passed all
1800+ tests from the <a href="http://www.oasis-open.org/committees/xml-conformance/">OASIS XML Tests
Suite</a>.</p><p>To some extent libxml2 provides support for the following additional
specifications but doesn't claim to implement them completely:</p><ul>
  <li>Document Object Model (DOM) <a href="http://www.w3.org/TR/DOM-Level-2-Core/">http://www.w3.org/TR/DOM-Level-2-Core/</a>
    the document model, but it doesn't implement the API itself, gdome2 does
    this on top of libxml2</li>
  <li><a href="http://www.cis.ohio-state.edu/rfc/rfc959.txt">RFC 959</a> :
    libxml2 implements a basic FTP client code</li>
  <li><a href="http://www.cis.ohio-state.edu/rfc/rfc1945.txt">RFC 1945</a> :
    HTTP/1.0, again a basic HTTP client code</li>
  <li>SAX: a SAX2 like interface and a minimal SAX1 implementation compatible
    with early expat versions</li>
</ul><p>A partial implementation of <a href="http://www.w3.org/TR/2001/REC-xmlschema-1-20010502/">XML Schemas Part
1: Structure</a> is being worked on but it would be far too early to make any
conformance statement about it at the moment.</p><p>Separate documents:</p><ul>
  <li><a href="http://xmlsoft.org/XSLT/">the libxslt page</a> providing an
    implementation of XSLT 1.0 and common extensions like EXSLT for
  libxml2</li>
  <li><a href="http://gdome2.cs.unibo.it/">the gdome2 page</a>
    : a standard DOM2 implementation for libxml2</li>
  <li><a href="http://www.aleksey.com/xmlsec/">the XMLSec page</a>: an
    implementation of <a href="http://www.w3.org/TR/xmldsig-core/">W3C XML
    Digital Signature</a> for libxml2</li>
  <li>also check the related links section for more related and active
    projects.</li>
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